JP2005053135A - Manufacturing method for calcium silicate molded product - Google Patents
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Abstract
Description
本発明は、珪酸カルシウム成形体の製造方法に関する。 The present invention relates to a method for producing a calcium silicate molded body.
従来、珪酸カルシウム、セメント等の水硬性材料を含むスラリーをプレス脱水成形して成形体を製造する方法が知られている。この方法において、従来、成形体の生産性、特に成形効率を高めるために各種の工夫が試みられている。 Conventionally, a method for producing a molded body by press dehydrating a slurry containing a hydraulic material such as calcium silicate and cement is known. Conventionally, in this method, various attempts have been made to increase the productivity of the molded body, in particular, the molding efficiency.
例えば、特許文献１には、ＧＲＣ（ガラス繊維強化セメント）及び水の混合物をプレス脱水成形して成形体を製造する際に、水の沸点以下の温度で混合物を加熱することにより、水分の蒸発及び成形体の硬化を促進して、脱型効率を高める技術が開示されている。これにより、成形体の生産性が高められる。また、特許文献１では、上下２つの型で混合物を挟み込み、成形体を製造する際に、脱型の容易な型を他方の型よりも低温にすることにより、脱型時に成形体を低温側の型に付着させて、高温側の型から成形体を容易に脱型する技術も開示されている。 For example, Patent Document 1 discloses that when a mixture is manufactured by press dehydration molding of a mixture of GRC (glass fiber reinforced cement) and water, the mixture is heated at a temperature below the boiling point of water to evaporate moisture. And the technique which accelerates | stimulates hardening of a molded object and raises demolding efficiency is disclosed. Thereby, productivity of a molded object is improved. Further, in Patent Document 1, when a mixture is sandwiched between two upper and lower molds and a molded body is manufactured, the mold that is easy to be removed is made lower in temperature than the other mold, so that the molded body is moved to the low temperature side during demolding. There is also disclosed a technique in which a molded body is easily removed from a high temperature mold by being attached to the mold.
その他、プレス脱水成形装置の台数を増加して、一つの製造ラインにおいて複数の成形装置を並列配置するか又は製造ラインを複数化することにより、単位時間における成形体の製造枚数を単純に増加させる方法が慣用されている。 In addition, by simply increasing the number of press dewatering molding devices and arranging a plurality of molding devices in parallel in one production line or by using multiple production lines, the number of molded products produced per unit time is simply increased. The method is conventional.
しかしながら、特許文献１のように成形時に加熱する方法では、成形体の生産性を向上させる効果が十分ではない。また、プレス脱水成形装置の台数を増加して、一つの製造ラインにおいて複数の成形装置を並列配置するか又は製造ラインを複数化する方法は、多大な設備投資を要するという問題がある。 However, the method of heating at the time of molding as in Patent Document 1 is not sufficient in improving the productivity of the molded body. In addition, a method of increasing the number of press dehydration molding apparatuses and arranging a plurality of molding apparatuses in parallel in one production line or making a plurality of production lines has a problem of requiring a large capital investment.
従って、プレス脱水成形により成形体を製造するに際し、従来法に比して、設備投資が少なく、且つ、成形体の生産性の高い製造方法の開発が望まれている。
本発明は、プレス脱水成形により成形体を製造するに際し、従来法に比して、設備投資が少なく、且つ、成形体の生産性の高い製造方法を提供することを主な目的とする。 The main object of the present invention is to provide a manufacturing method with less equipment investment and high productivity of a molded body when producing a molded body by press dehydration molding.
本発明者は、上記目的を達成すべく鋭意研究を重ねた結果、珪酸カルシウムを含む水性スラリーのプレス脱水成形工程を、特定の予備成形工程及び本成形工程に分けることにより、上記目的を達成できることを見出し、本発明を完成するに至った。 As a result of intensive studies to achieve the above object, the present inventor can achieve the above object by dividing the press dehydration molding process of aqueous slurry containing calcium silicate into a specific preforming process and a main molding process. As a result, the present invention has been completed.
即ち、本発明は、下記の珪酸カルシウム成形体の製造方法に係る。
１．珪酸カルシウムを含む水性スラリーのプレス脱水成形工程を有する珪酸カルシウム成形体の製造方法であって、プレス脱水成形工程が、連続する下記２工程からなることを特徴とする製造方法：
（１）珪酸カルシウムを含む水性スラリーを、形状維持が可能な予備成形体となるまで予備成形装置によりプレス脱水成形する予備成形工程、及び
（２）得られた予備成形体を、所定の成形体となるまで本成形装置によりプレス脱水成形する本成形工程。
２．珪酸カルシウムを含む水性スラリーのプレス脱水成形工程を有する珪酸カルシウム成形体の製造方法であって、プレス脱水成形工程が、連続する下記２工程：
（１）珪酸カルシウムを含む水性スラリーを、形状維持が可能な予備成形体となるまで予備成形装置によりプレス脱水成形する予備成形工程、及び
（２）得られた予備成形体を、所定の成形体となるまで本成形装置によりプレス脱水成形する本成形工程、
からなり、予備成形工程では、本成形装置の加圧面の大きさよりも小さな加圧面を有する予備成形装置を用いることを特徴とする上記項１記載の製造方法。
That is, this invention concerns on the manufacturing method of the following calcium silicate molded object.
1. A method for producing a calcium silicate compact having a press dehydration molding step of an aqueous slurry containing calcium silicate, wherein the press dehydration molding step comprises the following two steps:
(1) A preforming step of press-dehydrating an aqueous slurry containing calcium silicate with a preforming device until a preform capable of maintaining the shape is obtained, and (2) the obtained preform is a predetermined molded body. This molding process is press dewatering with this molding machine until it becomes.
2. A method for producing a calcium silicate compact having a press dehydration molding step of an aqueous slurry containing calcium silicate, wherein the press dehydration molding step is continuous in the following two steps:
(1) A preforming step of press-dehydrating an aqueous slurry containing calcium silicate with a preforming device until a preform capable of maintaining the shape is obtained, and (2) the obtained preform is a predetermined molded body. The main molding process of press dewatering molding with the main molding equipment until
The manufacturing method according to Item 1, wherein the preforming step uses a preforming device having a pressing surface smaller than the size of the pressing surface of the forming device.
本発明の珪酸カルシウム成形体の製造方法は、従来法に比して、設備投資が少なく、且つ、成形体の生産性が高い。特に、既存の製造ラインを改良して本発明の製造方法を実施する場合には、設備投資を最小限に抑えつつ、成形体の生産性を高めることができる。 The method for producing a calcium silicate molded body of the present invention has less equipment investment and higher productivity of the molded body than the conventional method. In particular, when the existing manufacturing line is improved and the manufacturing method of the present invention is carried out, the productivity of the molded body can be increased while minimizing the capital investment.
本発明の珪酸カルシウム成形体の製造方法は、珪酸カルシウムを含む水性スラリーのプレス脱水成形工程を有しており、プレス脱水形成工程が、連続する下記２工程からなることを特徴とする：
（１）珪酸カルシウムを含む水性スラリーを、形状維持が可能な予備成形体となるまで予備成形装置によりプレス脱水成形する予備成形工程、及び
（２）得られた予備成形体を、所定の成形体となるまで本成形装置によりプレス脱水成形する本成形工程。
The method for producing a calcium silicate molded body of the present invention includes a press dehydration molding step of an aqueous slurry containing calcium silicate, and the press dehydration forming step includes the following two steps:
(1) A preforming step of press-dehydrating an aqueous slurry containing calcium silicate with a preforming device until a preform capable of maintaining the shape is obtained, and (2) the obtained preform is a predetermined molded body. This molding process is press dewatering with this molding machine until it becomes.
珪酸カルシウムを含む水性スラリー（以下「水性スラリー」とも言う）としては特に限定されず、従来、プレス脱水成形により珪酸カルシウム成形体を製造するために用いられているものが使用できる。水性スラリーの固形分濃度は特に限定されないが、通常２〜２５重量％程度である。水性スラリーとしては、特に水性スラリー中の珪酸カルシウム水和物の嵩が大きいものが好ましい。珪酸カルシウム水和物の嵩が大きいものを得るためには、例えば、水性スラリー原料として合成珪酸カルシウム水和物を用いる場合は、合成時の珪酸質原料及び石灰質原料の合算重量に対する水の重量を５倍以上、好ましくは１０倍以上とすればよい。 The aqueous slurry containing calcium silicate (hereinafter also referred to as “aqueous slurry”) is not particularly limited, and those conventionally used for producing calcium silicate compacts by press dehydration molding can be used. The solid content concentration of the aqueous slurry is not particularly limited, but is usually about 2 to 25% by weight. As the aqueous slurry, those having a large volume of calcium silicate hydrate in the aqueous slurry are particularly preferable. In order to obtain a bulky calcium silicate hydrate, for example, when using synthetic calcium silicate hydrate as an aqueous slurry raw material, the weight of water relative to the combined weight of the siliceous raw material and calcareous raw material at the time of synthesis is set. It may be 5 times or more, preferably 10 times or more.
水性スラリーに含まれる珪酸カルシウムの種類は特に限定されないが、例えば、珪酸質原料及び石灰質原料を、水の存在下、必要に応じて撹拌しながら加熱・加圧等して得られる準結晶質珪酸カルシウム（ＣＳＨｎ）、トバモライト、ゾノトライト、フォシャジャイト、ジャイロライト、ワラストナイト等のゲル状物又は結晶よりなる合成珪酸カルシウム水和物が使用できる。 The type of calcium silicate contained in the aqueous slurry is not particularly limited. For example, the quasicrystalline silicic acid obtained by heating and pressurizing the siliceous raw material and the calcareous raw material in the presence of water with stirring as necessary. Synthetic calcium silicate hydrates made of gel or crystals such as calcium (CSHn), tobermorite, zonotrite, fosjaite, gyrolite, wollastonite and the like can be used.
水性スラリーには、必要に応じて、従来から諸物性を高めるために一般的に添加されている繊維状物質、各種添加剤等を配合してもよい。 If necessary, the aqueous slurry may be blended with fibrous substances, various additives, and the like that have been conventionally added to improve various physical properties.
繊維状物質としては、例えば、木綿、木材パルプ、古紙パルプ、ノットカス、麻、すさ、レーヨン繊維、ポリアミド繊維、ポリエステル繊維、ビニロン繊維、アラミド繊維、ポリオレフィン繊維等の有機繊維、石綿、岩綿、スラグウール、ガラス繊維、耐アルカリガラス繊維、シリカ繊維、アルミナ繊維、シリカアルミナ繊維、炭素繊維、無機ウィスカー等の無機繊維などが使用できる。これら繊維状物質は１種又は２種以上で使用できる。繊維状物質の種類、大きさ、配合量等は、水性スラリー又は成形体の所望の物性に応じて適宜調整できる。 Examples of fibrous materials include cotton, wood pulp, waste paper pulp, knot casks, hemp, bamboo grass, rayon fiber, polyamide fiber, polyester fiber, vinylon fiber, aramid fiber, polyolefin fiber and other organic fibers, asbestos, rock wool, slag Inorganic fibers such as wool, glass fiber, alkali-resistant glass fiber, silica fiber, alumina fiber, silica-alumina fiber, carbon fiber, and inorganic whisker can be used. These fibrous substances can be used alone or in combination of two or more. The kind, size, blending amount, and the like of the fibrous material can be adjusted as appropriate according to the desired physical properties of the aqueous slurry or molded body.
各種添加剤としては、例えば、石膏、セメント、粘土類、炭素物質、炭化物、窒化物、珪化物、金属酸化物、金属水酸化物、吸熱物質、着色剤、撥水剤、合成樹脂、界面活性剤、凝集剤、混和剤等が使用できる。これらは１種又は２種以上で使用できる。各種添加剤の種類、配合量等は、水性スラリー又は成形体の所望の物性に応じて適宜調整できる。 Various additives include, for example, gypsum, cement, clays, carbon substances, carbides, nitrides, silicides, metal oxides, metal hydroxides, endothermic substances, colorants, water repellents, synthetic resins, and surface active agents. Agents, flocculants, admixtures and the like can be used. These can be used alone or in combination of two or more. The types and blending amounts of various additives can be adjusted as appropriate according to the desired physical properties of the aqueous slurry or molded article.
予備成形工程
本発明の珪酸カルシウム成形体の製造方法では、先ず、水性スラリーを、形状維持（ハンドリング）が可能な予備成形体となるまで予備成形装置によりプレス脱水成形する。予備成形体には、形状維持が可能な程度の硬さが要求されるとともに、本成形工程において本成形装置の加圧面で金型の内面まで広がることのできる（流動できる）程度の粘弾性（含水率）を有することが好ましい。予備成形体の含水率は、流動性、最終製品である成形体の物性（用途）等に応じて適宜調整すればよい。
Preliminary molding step In the method for producing a calcium silicate molded body of the present invention, first, the aqueous slurry is press dehydrated by a preforming device until it becomes a preformed body capable of maintaining its shape (handling). The preform needs to have a hardness that can maintain the shape, and viscoelasticity (can flow) to the inner surface of the mold by the pressing surface of the molding apparatus in the molding process It is preferable to have a water content). What is necessary is just to adjust the moisture content of a preforming body suitably according to fluidity | liquidity, the physical property (use) of the molded object which is a final product, etc.
このような予備成形体を得るには、従来、プレス脱水成形により成形体を製造する際に用いるような、プレス圧力の大きな高価なプレス脱水装置は使用する必要はない。即ち、予備成形工程では、形状維持が可能な予備成形体を作製できるだけのプレス圧力が発揮できれば十分であり、大きなプレス圧力は必要ではないため、プレス圧力の低い安価なプレス脱水装置を使用できる。 In order to obtain such a preform, it is not necessary to use an expensive press dewatering apparatus having a large press pressure, which is conventionally used when producing a molded body by press dewatering molding. That is, in the pre-forming step, it is sufficient that a press pressure capable of producing a pre-formed body capable of maintaining the shape can be exhibited, and a large press pressure is not necessary. Therefore, an inexpensive press dewatering device having a low press pressure can be used.
プレス脱水成形装置としては、形状維持が可能な予備成形体を製造できるプレス圧力を有するものである限り特に限定されないが、例えば、特開昭５５−６４８５号公報に開示されたプレス脱水成形装置が好ましい。 The press dewatering apparatus is not particularly limited as long as it has a press pressure capable of producing a preform capable of maintaining the shape. For example, a press dewatering apparatus disclosed in JP-A-55-6485 is disclosed. preferable.
具体的には、特開昭５５−６４８５号公報には、下記の構成を有するプレス脱水成形装置が開示されている。
１）上面に排水通路を形成した台盤、
２）被処理スラリーを脱水するメッシュを有し且つ上記台盤上面に接触して配置されたネットコンベア、
３）上記台盤に該ネットコンベアを介して載架された上下動し得る筒枠状下型、
４）プレス機の可動定盤に取り付けられ、下面に被処理スラリーを脱水するための脱水層を有し且つ上記筒枠状下型内に進入し該下型と協働して、上記スラリーを加圧脱水し成形体を成形するための上型、及び
５）上記筒枠状下型の上昇時に該下型により上記上型と共に押え上げられる下型押え。
Specifically, Japanese Patent Laid-Open No. 55-6485 discloses a press dewatering molding apparatus having the following configuration.
1) A table with a drainage channel formed on the top surface,
2) A net conveyor having a mesh for dewatering the slurry to be treated and arranged in contact with the upper surface of the platform,
3) A cylindrical frame-shaped lower mold mounted on the base plate via the net conveyor and capable of moving up and down,
4) The slurry is attached to the movable surface plate of the press machine and has a dewatering layer for dewatering the slurry to be treated on the lower surface and enters the cylindrical lower mold and cooperates with the lower mold. An upper mold for forming a molded body by dehydrating under pressure, and 5) a lower mold presser that is pressed together with the upper mold by the lower mold when the cylindrical frame-shaped lower mold is raised.
但し、本発明の製造方法で使用するプレス脱水成形装置は、上記構成を有する装置に限定されるものではない。 However, the press dehydration molding apparatus used in the production method of the present invention is not limited to the apparatus having the above configuration.
なお、予備成形体が、例えば、ネットコンベア上を流れて、後述する本成形装置の位置まで移動した際に、停止位置の精度によっては、予備成形体が本成形装置（特に金型部分）と望まない接触をすることがある。従って、予備成形工程では、本成形装置の加圧面の大きさよりも小さな加圧面を有する予備成形装置を用いることが好ましい。具体的には、予備成形体と本成形装置との望まない接触を防止できる範囲内であって、本成形装置の加圧面の中心に予備成形体を配置した際に、本成形装置の加圧面の周囲（金型内面）から予備成形体の外周までの距離が２０ｍｍ以下、好ましくは５ｍｍ以下となる予備成形体が得られる予備成形装置が好ましい。 In addition, when a preformed body flows, for example, on a net conveyor and moves to the position of the main molding apparatus described later, depending on the accuracy of the stop position, the preformed body may be connected to the main molding apparatus (particularly the mold part). May cause unwanted contact. Therefore, in the preforming step, it is preferable to use a preforming device having a pressure surface smaller than the size of the pressure surface of the present molding device. Specifically, when the preform is placed in the center of the pressure surface of the molding device within the range in which unwanted contact between the preform and the molding device can be prevented, the pressure surface of the molding device A preforming apparatus is preferable in which a preform from which the distance from the periphery (inner surface of the mold) to the outer periphery of the preform is 20 mm or less, preferably 5 mm or less is obtained.
本成形工程
本発明の珪酸カルシウム成形体の製造方法では、次に、得られた予備成形体を、所定の成形体となるまで本成形装置によりプレス脱水成形する。本成形体の含水率は、最終製品である成形体の物性（用途）等に応じて適宜調整すればよい。
Main Forming Step Next, in the method for manufacturing a calcium silicate molded body of the present invention, the obtained preform is press dewatered and molded by the present molding apparatus until it becomes a predetermined molded body. What is necessary is just to adjust the moisture content of this molded object suitably according to the physical property (use) of the molded object which is a final product.
本成形体を得るには、従来、プレス脱水成形により成形体を製造する際に使用するような、プレス圧力の高い脱水成形装置を使用することが好ましい。これは、嵩比重の小さい予備成形体をさらに圧縮して所望の成形体とするため、予備成形装置よりも高いプレス圧力が要求されるからである。 In order to obtain this molded article, it is preferable to use a dehydrating apparatus having a high press pressure, which is conventionally used when producing a molded article by press dehydration molding. This is because in order to further compress a preform having a small bulk specific gravity to obtain a desired molded body, a higher press pressure than that of the preforming apparatus is required.
プレス脱水成形装置としては、所定の本成形体を製造できるプレス圧力を有するものである限り特に限定されないが、例えば、前記１）〜５）の構成を有するプレス脱水成形装置を好適に使用できる。 Although it does not specifically limit as long as it has a press pressure which can manufacture a predetermined | prescribed main molded object, For example, the press dehydration molding apparatus which has the structure of said 1) -5) can be used conveniently.
連続するプレス脱水成形工程
本発明の珪酸カルシウム成形体の製造方法は、上記した予備成形工程及び本成形工程を連続的に実施する。即ち、予備成形後に本成形を行うという一連のプレス脱水成形工程を一つの生産ライン上で連続的に行う。これにより、先に得られた予備成形体の本成形を行う間に、次の成形体の予備成形を同時に行うため、生産ライン全体の単位時間あたりの成形量を比較すると、従来法に比して、成形体の生産性が高い。
Continuous press dehydration molding process The manufacturing method of the calcium silicate molded body of the present invention continuously performs the above-described preliminary molding process and the main molding process. That is, a series of press dehydration molding processes in which main molding is performed after preliminary molding are continuously performed on one production line. As a result, during the main molding of the preformed body obtained previously, the next molded body is preformed at the same time. Compared with the conventional method, the molding amount per unit time of the entire production line is compared. Therefore, the productivity of the molded body is high.
換言すると、上記連続するプレス脱水成形工程を採用することにより、プレス圧力の高い高価な成形装置を２台導入するまでの設備投資を要することなく、成形体の生産性を効率的に高めることができる。特に、現状の製造ラインを利用して、現状の成形装置の前工程に予備成形を行い得る安価な予備成形装置を導入し、本発明の製造方法を実施する場合には、最小限の設備投資で成形体の生産性を高めることができる。 In other words, by adopting the above continuous press dehydration molding process, it is possible to efficiently increase the productivity of the molded body without requiring capital investment until two expensive molding apparatuses with high press pressure are introduced. it can. In particular, using the current production line, introducing an inexpensive preforming device that can perform preforming in the previous process of the current molding device, and implementing the manufacturing method of the present invention, the minimum capital investment Thus, the productivity of the molded body can be increased.
以下に実施例を示して本発明をより具体的に説明する。但し、本発明は実施例に限定されない。 The present invention will be described more specifically with reference to the following examples. However, the present invention is not limited to the examples.
参考例１
プレス時の面圧を最高１５０Ｋｇ／ｃｍ2まで上げられるプレス脱水成形装置の長方形の下金型（内寸：縦１０００ｍｍ、横３０００ｍｍ）に、合成珪酸カルシウム水和物結晶の一つであるゾノトライト結晶の球状二次粒子（水和物合成時の珪酸質原料と石灰質原料との合算重量に対する水の重量比が１２）を主成分とする水性スラリー（内訳（重量部）：ゾノトライト結晶６９部、セメント２２部、ベントナイト５部、パルプ１部、ガラス繊維３部及び水９００部）を投入後、下金型に対応した上金型を押込み、プレス脱水成形後、脱型して厚さ１７ｍｍの成形体（乾燥後の比重０．３）を得た。成形体の作製直後の含水率は、約３００重量％であった。
Reference example 1
A zonotlite crystal, one of the synthetic calcium silicate hydrate crystals, is placed on a rectangular lower die (inner dimensions: 1000 mm length, 3000 mm width) of a press dehydration molding device that can increase the surface pressure during pressing to a maximum of 150 kg / cm 2 Aqueous slurry (breakdown (parts by weight): 69 parts of zonotlite crystals, cement, with a spherical secondary particle (the weight ratio of water to the total weight of the siliceous raw material and calcareous raw material at the time of hydrate synthesis is 12) 22 parts, bentonite 5 parts, pulp 1 part, glass fiber 3 parts and water 900 parts), then press the upper die corresponding to the lower die, press dehydration molding, demolding and forming 17 mm thick A body (specific gravity 0.3 after drying) was obtained. The moisture content immediately after production of the molded body was about 300% by weight.
実施例１
参考例１のプレス脱水成形工程を本成形工程とし、その前工程として予備成形工程を設けた。予備成形装置としては、プレス時の面圧を最高１０Ｋｇ／ｃｍ2まで上げられるプレス脱水成形装置を使用した。
Example 1
The press dehydration molding process of Reference Example 1 was set as the main molding process, and a preliminary molding process was provided as a previous process. As the pre-molding apparatus, a press dewatering molding apparatus capable of increasing the surface pressure during pressing to a maximum of 10 kg / cm 2 was used.
具体的には、予備成形装置の長方形の下金型（内寸：縦９９０ｍｍ、横２９９０ｍｍ）に、参考例１で用いた水性スラリーを投入後、下金型に対応した上金型を押込み、プレス脱水成形後、脱型して厚さ２９ｍｍの予備成形体を得た。予備成形体の含水率は、約５３０重量％であった。次いで、予備成形体を本成形装置の下金型の加圧面中央に配置（下金型の縦・横の内面から予備成形体の縦・横の外面までの距離が各々約５ｍｍ）し、そこへ下金型に対応した上金型を押込み、プレス脱水成形後、脱型して厚さ１７ｍｍの本成形体（乾燥後の比重０．３）を得た。本成形体の作製直後の含水率は、約３００重量％であった。 Specifically, after the aqueous slurry used in Reference Example 1 is charged into a rectangular lower mold (inner dimensions: length 990 mm, width 2990 mm) of the preforming device, an upper mold corresponding to the lower mold is pushed in, After the press dehydration molding, the mold was removed to obtain a preform with a thickness of 29 mm. The water content of the preform was about 530% by weight. Next, the preform is placed in the center of the pressing surface of the lower mold of the molding apparatus (the distance from the vertical and horizontal inner surfaces of the lower mold to the vertical and horizontal outer surfaces of the preform is about 5 mm, respectively) The upper mold corresponding to the lower mold was pushed in, press-dehydrated and then demolded to obtain a molded body having a thickness of 17 mm (specific gravity 0.3 after drying). The water content immediately after production of the molded body was about 300% by weight.
実施例１のように予備成形及び本成形を連続的に行って本成形体を作製した場合には、予備成形及び本成形の各々の成形時間は、参考例１のような従来型の成形時間と比べて約半分となる。即ち、本発明の製造方法では、例えば、ネットコンベア等を介して、予備成形装置への水性スラリーの投入、予備成形体の本成形装置への移送、本成形体の取り出しという一連の動作を連続的に行うことにより、先に得られた予備成形体が本成形されている間に、次の予備成形体が得られるため、所定の本成形体を従来法に比して、約半分の時間で成形体を連続作製することができる。参考例１と実施例１とを比較すると、所定の本成形体１００枚を連続作製する生産効率は、実施例１の方が参考例１の方法に比して１．７６倍高かった。 When the preform and the main molding are continuously performed as in Example 1 to produce the main molded body, each molding time of the preliminary molding and the main molding is the molding time of the conventional type as in Reference Example 1. It becomes about half compared with. That is, in the manufacturing method of the present invention, for example, a series of operations of feeding the aqueous slurry into the preforming apparatus, transferring the preformed body to the molding apparatus, and taking out the molded body continuously via a net conveyor or the like. In this case, the next preformed body is obtained while the previously obtained preform is being molded. Therefore, the predetermined body is approximately half the time compared to the conventional method. Thus, a molded body can be continuously produced. Comparing Reference Example 1 and Example 1, the production efficiency for continuously producing 100 predetermined molded bodies was 1.76 times higher in Example 1 than in the method of Reference Example 1.
Claims (2)
（１）珪酸カルシウムを含む水性スラリーを、形状維持が可能な予備成形体となるまで予備成形装置によりプレス脱水成形する予備成形工程、及び
（２）得られた予備成形体を、所定の成形体となるまで本成形装置によりプレス脱水成形する本成形工程。 A method for producing a calcium silicate compact having a press dehydration molding step of an aqueous slurry containing calcium silicate, wherein the press dehydration molding step comprises the following two steps:
(1) A preforming step of press-dehydrating an aqueous slurry containing calcium silicate with a preforming device until a preform capable of maintaining the shape is obtained, and (2) the obtained preform is a predetermined molded body. This molding process is press dewatering with this molding machine until it becomes.
（１）珪酸カルシウムを含む水性スラリーを、形状維持が可能な予備成形体となるまで予備成形装置によりプレス脱水成形する予備成形工程、及び
（２）得られた予備成形体を、所定の成形体となるまで本成形装置によりプレス脱水成形する本成形工程、
からなり、予備成形工程では、本成形装置の加圧面の大きさよりも小さな加圧面を有する予備成形装置を用いることを特徴とする請求項１記載の製造方法。 A method for producing a calcium silicate compact having a press dehydration molding step of an aqueous slurry containing calcium silicate, wherein the press dehydration molding step is continuous in the following two steps:
(1) A preforming step of press-dehydrating an aqueous slurry containing calcium silicate with a preforming device until a preform capable of maintaining the shape is obtained, and (2) the obtained preform is a predetermined molded body. The main molding process of press dewatering molding with the main molding equipment until
The manufacturing method according to claim 1, wherein the preforming step uses a preforming device having a pressure surface smaller than the size of the pressure surface of the molding device.
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